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Related Concept Videos

Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

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Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
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Related Experiment Video

Updated: Mar 11, 2026

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
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LOVTRAP: A Versatile Method to Control Protein Function with Light.

Hui Wang1, Klaus M Hahn1

  • 1Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.

Current Protocols in Cell Biology
|December 2, 2016
PubMed
Summary
This summary is machine-generated.

LOVTRAP is a novel technique that uses light to reversibly control protein location in cells. This method allows scientists to sequester proteins at mitochondria and release them upon light irradiation for precise biological studies.

Keywords:
LOVTRAPZdkdissociationlocalizationoptogeneticssignaling

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • Cellular processes are tightly regulated by protein localization.
  • Controlling protein activity spatially and temporally is crucial for understanding cell function.
  • Existing methods for protein manipulation can be limited in speed and reversibility.

Purpose of the Study:

  • To introduce LOVTRAP, a light-inducible system for reversible protein sequestration and release from cellular membranes.
  • To demonstrate the application of LOVTRAP for controlling the localization of plasma membrane proteins.

Main Methods:

  • LOVTRAP utilizes the light-sensitive interaction between engineered Zdk and LOV2 domains.
  • Proteins of interest are tagged with one domain, while the target membrane compartment is tagged with the other.
  • Light irradiation (400-500 nm) triggers the dissociation of the Zdk/LOV2 complex, releasing the protein.

Main Results:

  • The Zdk/LOV2 interaction exhibits high affinity in the dark (<30 nM) and low affinity upon light exposure (>500 nM).
  • Light-induced protein release is rapid, occurring in less than one second.
  • The system demonstrates reversibility, with adjustable return half-lives (2-500 sec) via LOV domain mutations.

Conclusions:

  • LOVTRAP provides a versatile and efficient tool for light-controlled protein localization.
  • The technique is applicable to diverse proteins and offers precise temporal and spatial control over protein activity.
  • This method facilitates advanced research in cell biology and molecular mechanisms.